Or An St165 Rail. I've Done It. All That's Needed Is 2 Brackets. Not Very Hard. I Believe On A Gen2 The Space Between Cul 2 And 3 Is Bigger Than 1+2 And 3+4, Whereas Gen3 The spaces Are The Same All The Way across

You can use a 5sfe rail and cut the cups off the 2nd gen 3sgte rail, that's what I did. Very very cheap lol total cost was less than 20 $ (not counting injectors obviously). I use modded wrx injectors, they flow upwards of 800cc and can be found for under 100 $.